During a recent conversation with a client, the issue of testing hydraulic pump rebuilds came up. As I explain in Insider Secrets to Hydraulics, it is essential that all hydraulic components are properly tested after rebuild. Ensuring a repaired component will perform the way it should when it’s installed on the machine BEFORE it leaves the repair shop, instills … Read more
Tag Archives: hydraulic pump
The Official Word On Hydraulic Pump Suction Strainers
While doing some fact checking for a consulting job, I had cause to review Australian Standard AS 2671; Hydraulic Fluid Power-General Requirements for Systems. This Australian Standard is basically the International Standard, ISO 4413 with some amendments based on the local advisory committee’s input.
One of these amendments has to do with pump suction strainers. Section 8.3.3 of ISO 4413:2010, … Read more
Why a Hydraulic Pump Should Never Be Completely Unloaded
One of the advantages of variable-displacement pumps with hydraulic or electro-hydraulic displacement control, or load-sensing control, is their low standby pressure. Meaning, when pump output isn’t required, the pump ‘stands by’ at a relatively low pressure, and usually at zero flow — other than that necessary for the make-up of internal leakage.
From an efficiency (heat-load) perspective, the lower this … Read more